Service contract management for sanitary sewer cleaning, CCTV, cured-in-place pipelining, small repairs, manhole rehabilitation, and root removal

摘要

The City of Austin Water Utility, starting on the path to compliance with thernproposed United States Environmental Protection Agency's Capacity, Management, Operationsrnand Maintenance (CMOM) program and to eliminate Sanitary Sewer Overflows to the greatestrnextent possible, developed an Enhanced Maintenance Program. The program addresses basinsrnthat were not scheduled for a Sewer System Evaluation Survey (SSES), based on thernInfiltration/Inflow Analysis studies, through the Austin Clean Water Program. The SSES basinsrnencompass approximately 40%, or 1,062 miles, of the 2,656 miles of sanitary sewers in the WaterrnUtility Service Area. This Enhanced Maintenance Program is targeted at addressing thernremaining 60%, or 1,594 miles, of sewers. To supplement existing staff capabilities to identifyrnand rehabilitate sources that could potentially result in dry weather Sanitary Sewer Overflows thernWater Utility needed to identify services that could be out-sourced. The service contracts tornsupplement existing staff programs included sewer cleaning and closed circuit televisionrninspection to perform a system condition assessment. Water Utility staff is performing thernmanhole inspections to identify additional rehabilitation needs. Service contracts were developedrnand firms selected to perform cured-in-place pipe lining. Through the service contracts the WaterrnUtility has cleaned and televised 35 miles of sanitary sewer and installed 8.4 miles of cured-inplacernpipe liner. Through the Enhanced Maintenance Program the Utility's monthly movingrnaverage report on reportable sanitary sewer overflows has documented an approximate 32%rnreduction. This paper describes the procedures and staff efforts required to manage servicerncontracts for cleaning, CCTV, cured-in-place pipe lining, small repairs, manhole rehabilitationrnand root removal and hopes to stimulate a discussion with other Collection System and servicernfirm manager's.